Lead is a toxic factor in jarosite residue, and it important to study its release behavior from simulated lead residue (LSJ) predict the stability of impact on environment. This investigated ion behavior, leaching toxicity, stability, migration LSJ during freeze–thaw cycling with thiourea (T-FTC). The lead, iron, sulfate radicals via T-FTC was influenced by several factors. Under specific condi...

Base isolators and fluid viscous dampers are viable protective devices that have been commonly considered in the seismic protection of civil engineering structures. However, optimal design these remains a tedious iterative undertaking due to uncertainty ground motions, nonlinear behavior structure, its change dynamic characteristics (i.e., effective stiffness damping ratio) under each new desig...

Corynespora cassiicola was a devastating pathogen attributed to heavy leaf fall in susceptible clones of rubber (Hevea brasiliensis), in the mid-eighties in Sri Lanka. It is known to have a wide host range. This is the first report of C. cassiicola as a leaf pathogen of croton, Codiaeum veriegatum, an ornamental plant. This report emphasizes the possibility of C. cassiicola infecting new hosts ...

In this paper, annoyance ratings from traffic noise recorded on cobblestones, dense asphalt, and open asphalt rubber pavements are assessed with regard to car speeds and traffic densities. It was found that cobblestones pavements are the most annoying; also while open asphalt rubber pavement imposes less annoyance than dense asphalt it is not significantly different. Higher car speeds always le...

The article provides a mathematical model of the vertical oscillations main shaft on elastic supports sewing machine, taking into account inertial forces, as well rigidity characteristics rubber supports. regularities designs are experimentally determined for various modes grinding materials. An effective design scheme bearing with shock absorbers machine has been developed and recommended.